--- /dev/null
+/*
+ * (C) Copyright 2011, 2012, 2013
+ * Yuri Tikhonov, Emcraft Systems, yur@emcraft.com
+ * Alexander Potashev, Emcraft Systems, aspotashev@emcraft.com
+ * Vladimir Khusainov, Emcraft Systems, vlad@emcraft.com
+ * Pavel Boldin, Emcraft Systems, paboldin@emcraft.com
+ *
+ * (C) Copyright 2015
+ * Kamil Lulko, <rev13@wp.pl>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/armv7m.h>
+#include <asm/arch/stm32.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/fmc.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+const struct stm32_gpio_ctl gpio_ctl_gpout = {
+ .mode = STM32_GPIO_MODE_OUT,
+ .otype = STM32_GPIO_OTYPE_PP,
+ .speed = STM32_GPIO_SPEED_50M,
+ .pupd = STM32_GPIO_PUPD_NO,
+ .af = STM32_GPIO_AF0
+};
+
+const struct stm32_gpio_ctl gpio_ctl_usart = {
+ .mode = STM32_GPIO_MODE_AF,
+ .otype = STM32_GPIO_OTYPE_PP,
+ .speed = STM32_GPIO_SPEED_50M,
+ .pupd = STM32_GPIO_PUPD_UP,
+ .af = STM32_GPIO_AF7
+};
+
+static const struct stm32_gpio_dsc usart1_gpio[] = {
+ {STM32_GPIO_PORT_A, STM32_GPIO_PIN_9}, /* TX */
+ {STM32_GPIO_PORT_A, STM32_GPIO_PIN_10}, /* RX */
+};
+
+int uart1_setup_gpio(void)
+{
+ int i;
+ int rv = 0;
+
+ for (i = 0; i < ARRAY_SIZE(usart1_gpio); i++) {
+ rv = stm32_gpio_config(&usart1_gpio[i], &gpio_ctl_usart);
+ if (rv)
+ goto out;
+ }
+
+out:
+ return rv;
+}
+
+const struct stm32_gpio_ctl gpio_ctl_fmc = {
+ .mode = STM32_GPIO_MODE_AF,
+ .otype = STM32_GPIO_OTYPE_PP,
+ .speed = STM32_GPIO_SPEED_100M,
+ .pupd = STM32_GPIO_PUPD_NO,
+ .af = STM32_GPIO_AF12
+};
+
+static const struct stm32_gpio_dsc ext_ram_fmc_gpio[] = {
+ /* Chip is LQFP144, see DM00077036.pdf for details */
+ {STM32_GPIO_PORT_D, STM32_GPIO_PIN_10}, /* 79, FMC_D15 */
+ {STM32_GPIO_PORT_D, STM32_GPIO_PIN_9}, /* 78, FMC_D14 */
+ {STM32_GPIO_PORT_D, STM32_GPIO_PIN_8}, /* 77, FMC_D13 */
+ {STM32_GPIO_PORT_E, STM32_GPIO_PIN_15}, /* 68, FMC_D12 */
+ {STM32_GPIO_PORT_E, STM32_GPIO_PIN_14}, /* 67, FMC_D11 */
+ {STM32_GPIO_PORT_E, STM32_GPIO_PIN_13}, /* 66, FMC_D10 */
+ {STM32_GPIO_PORT_E, STM32_GPIO_PIN_12}, /* 65, FMC_D9 */
+ {STM32_GPIO_PORT_E, STM32_GPIO_PIN_11}, /* 64, FMC_D8 */
+ {STM32_GPIO_PORT_E, STM32_GPIO_PIN_10}, /* 63, FMC_D7 */
+ {STM32_GPIO_PORT_E, STM32_GPIO_PIN_9}, /* 60, FMC_D6 */
+ {STM32_GPIO_PORT_E, STM32_GPIO_PIN_8}, /* 59, FMC_D5 */
+ {STM32_GPIO_PORT_E, STM32_GPIO_PIN_7}, /* 58, FMC_D4 */
+ {STM32_GPIO_PORT_D, STM32_GPIO_PIN_1}, /* 115, FMC_D3 */
+ {STM32_GPIO_PORT_D, STM32_GPIO_PIN_0}, /* 114, FMC_D2 */
+ {STM32_GPIO_PORT_D, STM32_GPIO_PIN_15}, /* 86, FMC_D1 */
+ {STM32_GPIO_PORT_D, STM32_GPIO_PIN_14}, /* 85, FMC_D0 */
+ {STM32_GPIO_PORT_E, STM32_GPIO_PIN_1}, /* 142, FMC_NBL1 */
+ {STM32_GPIO_PORT_E, STM32_GPIO_PIN_0}, /* 141, FMC_NBL0 */
+ {STM32_GPIO_PORT_G, STM32_GPIO_PIN_5}, /* 90, FMC_A15, BA1 */
+ {STM32_GPIO_PORT_G, STM32_GPIO_PIN_4}, /* 89, FMC_A14, BA0 */
+ {STM32_GPIO_PORT_G, STM32_GPIO_PIN_1}, /* 57, FMC_A11 */
+ {STM32_GPIO_PORT_G, STM32_GPIO_PIN_0}, /* 56, FMC_A10 */
+ {STM32_GPIO_PORT_F, STM32_GPIO_PIN_15}, /* 55, FMC_A9 */
+ {STM32_GPIO_PORT_F, STM32_GPIO_PIN_14}, /* 54, FMC_A8 */
+ {STM32_GPIO_PORT_F, STM32_GPIO_PIN_13}, /* 53, FMC_A7 */
+ {STM32_GPIO_PORT_F, STM32_GPIO_PIN_12}, /* 50, FMC_A6 */
+ {STM32_GPIO_PORT_F, STM32_GPIO_PIN_5}, /* 15, FMC_A5 */
+ {STM32_GPIO_PORT_F, STM32_GPIO_PIN_4}, /* 14, FMC_A4 */
+ {STM32_GPIO_PORT_F, STM32_GPIO_PIN_3}, /* 13, FMC_A3 */
+ {STM32_GPIO_PORT_F, STM32_GPIO_PIN_2}, /* 12, FMC_A2 */
+ {STM32_GPIO_PORT_F, STM32_GPIO_PIN_1}, /* 11, FMC_A1 */
+ {STM32_GPIO_PORT_F, STM32_GPIO_PIN_0}, /* 10, FMC_A0 */
+ {STM32_GPIO_PORT_B, STM32_GPIO_PIN_6}, /* 136, SDRAM_NE */
+ {STM32_GPIO_PORT_F, STM32_GPIO_PIN_11}, /* 49, SDRAM_NRAS */
+ {STM32_GPIO_PORT_G, STM32_GPIO_PIN_15}, /* 132, SDRAM_NCAS */
+ {STM32_GPIO_PORT_C, STM32_GPIO_PIN_0}, /* 26, SDRAM_NWE */
+ {STM32_GPIO_PORT_B, STM32_GPIO_PIN_5}, /* 135, SDRAM_CKE */
+ {STM32_GPIO_PORT_G, STM32_GPIO_PIN_8}, /* 93, SDRAM_CLK */
+};
+
+static int fmc_setup_gpio(void)
+{
+ int rv = 0;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ext_ram_fmc_gpio); i++) {
+ rv = stm32_gpio_config(&ext_ram_fmc_gpio[i],
+ &gpio_ctl_fmc);
+ if (rv)
+ goto out;
+ }
+
+out:
+ return rv;
+}
+
+/*
+ * STM32 RCC FMC specific definitions
+ */
+#define STM32_RCC_ENR_FMC (1 << 0) /* FMC module clock */
+
+static inline u32 _ns2clk(u32 ns, u32 freq)
+{
+ u32 tmp = freq/1000000;
+ return (tmp * ns) / 1000;
+}
+
+#define NS2CLK(ns) (_ns2clk(ns, freq))
+
+/*
+ * Following are timings for IS42S16400J, from corresponding datasheet
+ */
+#define SDRAM_CAS 3 /* 3 cycles */
+#define SDRAM_NB 1 /* Number of banks */
+#define SDRAM_MWID 1 /* 16 bit memory */
+
+#define SDRAM_NR 0x1 /* 12-bit row */
+#define SDRAM_NC 0x0 /* 8-bit col */
+#define SDRAM_RBURST 0x1 /* Single read requests always as bursts */
+#define SDRAM_RPIPE 0x0 /* No HCLK clock cycle delay */
+
+#define SDRAM_TRRD (NS2CLK(14) - 1)
+#define SDRAM_TRCD (NS2CLK(15) - 1)
+#define SDRAM_TRP (NS2CLK(15) - 1)
+#define SDRAM_TRAS (NS2CLK(42) - 1)
+#define SDRAM_TRC (NS2CLK(63) - 1)
+#define SDRAM_TRFC (NS2CLK(63) - 1)
+#define SDRAM_TCDL (1 - 1)
+#define SDRAM_TRDL (2 - 1)
+#define SDRAM_TBDL (1 - 1)
+#define SDRAM_TREF 1386
+#define SDRAM_TCCD (1 - 1)
+
+#define SDRAM_TXSR (NS2CLK(70) - 1)/* Row cycle time after precharge */
+#define SDRAM_TMRD (3 - 1) /* Page 10, Mode Register Set */
+
+/* Last data-in to row precharge, need also comply ineq from RM 37.7.5 */
+#define SDRAM_TWR max(\
+ (int)max((int)SDRAM_TRDL, (int)(SDRAM_TRAS - SDRAM_TRCD - 1)), \
+ (int)(SDRAM_TRC - SDRAM_TRCD - SDRAM_TRP - 2)\
+)
+
+#define SDRAM_MODE_BL_SHIFT 0
+#define SDRAM_MODE_CAS_SHIFT 4
+#define SDRAM_MODE_BL 0
+#define SDRAM_MODE_CAS SDRAM_CAS
+
+int dram_init(void)
+{
+ u32 freq;
+ int rv;
+
+ rv = fmc_setup_gpio();
+ if (rv)
+ return rv;
+
+ setbits_le32(&STM32_RCC->ahb3enr, STM32_RCC_ENR_FMC);
+
+ /*
+ * Get frequency for NS2CLK calculation.
+ */
+ freq = clock_get(CLOCK_AHB) / CONFIG_SYS_RAM_FREQ_DIV;
+
+ writel(CONFIG_SYS_RAM_FREQ_DIV << FMC_SDCR_SDCLK_SHIFT
+ | SDRAM_RPIPE << FMC_SDCR_RPIPE_SHIFT
+ | SDRAM_RBURST << FMC_SDCR_RBURST_SHIFT,
+ &STM32_SDRAM_FMC->sdcr1);
+
+ writel(CONFIG_SYS_RAM_FREQ_DIV << FMC_SDCR_SDCLK_SHIFT
+ | SDRAM_CAS << FMC_SDCR_CAS_SHIFT
+ | SDRAM_NB << FMC_SDCR_NB_SHIFT
+ | SDRAM_MWID << FMC_SDCR_MWID_SHIFT
+ | SDRAM_NR << FMC_SDCR_NR_SHIFT
+ | SDRAM_NC << FMC_SDCR_NC_SHIFT
+ | SDRAM_RPIPE << FMC_SDCR_RPIPE_SHIFT
+ | SDRAM_RBURST << FMC_SDCR_RBURST_SHIFT,
+ &STM32_SDRAM_FMC->sdcr2);
+
+ writel(SDRAM_TRP << FMC_SDTR_TRP_SHIFT
+ | SDRAM_TRC << FMC_SDTR_TRC_SHIFT,
+ &STM32_SDRAM_FMC->sdtr1);
+
+ writel(SDRAM_TRCD << FMC_SDTR_TRCD_SHIFT
+ | SDRAM_TRP << FMC_SDTR_TRP_SHIFT
+ | SDRAM_TWR << FMC_SDTR_TWR_SHIFT
+ | SDRAM_TRC << FMC_SDTR_TRC_SHIFT
+ | SDRAM_TRAS << FMC_SDTR_TRAS_SHIFT
+ | SDRAM_TXSR << FMC_SDTR_TXSR_SHIFT
+ | SDRAM_TMRD << FMC_SDTR_TMRD_SHIFT,
+ &STM32_SDRAM_FMC->sdtr2);
+
+ writel(FMC_SDCMR_BANK_2 | FMC_SDCMR_MODE_START_CLOCK,
+ &STM32_SDRAM_FMC->sdcmr);
+
+ udelay(200); /* 200 us delay, page 10, "Power-Up" */
+ FMC_BUSY_WAIT();
+
+ writel(FMC_SDCMR_BANK_2 | FMC_SDCMR_MODE_PRECHARGE,
+ &STM32_SDRAM_FMC->sdcmr);
+
+ udelay(100);
+ FMC_BUSY_WAIT();
+
+ writel((FMC_SDCMR_BANK_2 | FMC_SDCMR_MODE_AUTOREFRESH
+ | 7 << FMC_SDCMR_NRFS_SHIFT), &STM32_SDRAM_FMC->sdcmr);
+
+ udelay(100);
+ FMC_BUSY_WAIT();
+
+ writel(FMC_SDCMR_BANK_2 | (SDRAM_MODE_BL << SDRAM_MODE_BL_SHIFT
+ | SDRAM_MODE_CAS << SDRAM_MODE_CAS_SHIFT)
+ << FMC_SDCMR_MODE_REGISTER_SHIFT | FMC_SDCMR_MODE_WRITE_MODE,
+ &STM32_SDRAM_FMC->sdcmr);
+
+ udelay(100);
+
+ FMC_BUSY_WAIT();
+
+ writel(FMC_SDCMR_BANK_2 | FMC_SDCMR_MODE_NORMAL,
+ &STM32_SDRAM_FMC->sdcmr);
+
+ FMC_BUSY_WAIT();
+
+ /* Refresh timer */
+ writel(SDRAM_TREF, &STM32_SDRAM_FMC->sdrtr);
+
+ /*
+ * Fill in global info with description of SRAM configuration
+ */
+ gd->bd->bi_dram[0].start = CONFIG_SYS_RAM_BASE;
+ gd->bd->bi_dram[0].size = CONFIG_SYS_RAM_SIZE;
+
+ gd->ram_size = CONFIG_SYS_RAM_SIZE;
+
+ return rv;
+}
+
+u32 get_board_rev(void)
+{
+ return 0;
+}
+
+int board_early_init_f(void)
+{
+ int res;
+
+ res = uart1_setup_gpio();
+ if (res)
+ return res;
+
+ return 0;
+}
+
+int board_init(void)
+{
+ gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
+
+ return 0;
+}
--- /dev/null
+/*
+ * (C) Copyright 2015
+ * Kamil Lulko, <rev13@wp.pl>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __CONFIG_H
+#define __CONFIG_H
+
+#define CONFIG_STM32F4
+#define CONFIG_STM32F4DISCOVERY
+#define CONFIG_SYS_GENERIC_BOARD
+
+#define CONFIG_OF_LIBFDT
+
+#define CONFIG_BOARD_EARLY_INIT_F
+
+#define CONFIG_SYS_FLASH_BASE 0x08000000
+
+#define CONFIG_SYS_INIT_SP_ADDR 0x10010000
+#define CONFIG_SYS_TEXT_BASE 0x08000000
+
+#define CONFIG_SYS_ICACHE_OFF
+#define CONFIG_SYS_DCACHE_OFF
+
+/*
+ * Configuration of the external SDRAM memory
+ */
+#define CONFIG_NR_DRAM_BANKS 1
+#define CONFIG_SYS_RAM_SIZE (8 << 20)
+#define CONFIG_SYS_RAM_CS 1
+#define CONFIG_SYS_RAM_FREQ_DIV 2
+#define CONFIG_SYS_RAM_BASE 0xD0000000
+#define CONFIG_SYS_SDRAM_BASE CONFIG_SYS_RAM_BASE
+#define CONFIG_SYS_LOAD_ADDR 0xD0400000
+#define CONFIG_LOADADDR 0xD0400000
+
+#define CONFIG_SYS_MAX_FLASH_SECT 12
+#define CONFIG_SYS_MAX_FLASH_BANKS 2
+
+#define CONFIG_ENV_IS_IN_FLASH
+#define CONFIG_ENV_OFFSET (256 << 10)
+#define CONFIG_ENV_SECT_SIZE (128 << 10)
+#define CONFIG_ENV_SIZE (8 << 10)
+
+#define CONFIG_BOARD_SPECIFIC_LED
+#define CONFIG_RED_LED 110
+#define CONFIG_GREEN_LED 109
+
+#define CONFIG_STM32_GPIO
+#define CONFIG_STM32_SERIAL
+
+#define CONFIG_STM32_USART1
+
+#define CONFIG_STM32_HSE_HZ 8000000
+
+#define CONFIG_SYS_HZ_CLOCK 1000000 /* Timer is clocked at 1MHz */
+
+#define CONFIG_CMDLINE_TAG
+#define CONFIG_SETUP_MEMORY_TAGS
+#define CONFIG_INITRD_TAG
+#define CONFIG_REVISION_TAG
+
+#define CONFIG_SYS_CBSIZE 1024
+#define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE \
+ + sizeof(CONFIG_SYS_PROMPT) + 16)
+
+#define CONFIG_SYS_MAXARGS 16
+
+#define CONFIG_SYS_MALLOC_LEN (2 << 20)
+
+#define CONFIG_STACKSIZE (64 << 10)
+
+#define CONFIG_BAUDRATE 115200
+#define CONFIG_BOOTARGS \
+ "console=ttystm0,115200 earlyprintk consoleblank=0 ignore_loglevel"
+#define CONFIG_BOOTCOMMAND \
+ "run bootcmd_romfs"
+
+#define CONFIG_EXTRA_ENV_SETTINGS \
+ "bootargs_romfs=uclinux.physaddr=0x08180000 root=/dev/mtdblock0\0" \
+ "bootcmd_romfs=setenv bootargs ${bootargs} ${bootargs_romfs};" \
+ "bootm 0x08044000 - 0x08042000\0"
+
+#define CONFIG_BOOTDELAY 3
+#define CONFIG_AUTOBOOT
+
+/*
+ * Command line configuration.
+ */
+#include <config_cmd_default.h>
+
+#define CONFIG_SYS_LONGHELP
+#define CONFIG_SYS_HUSH_PARSER
+#define CONFIG_SYS_PROMPT "U-Boot > "
+#define CONFIG_AUTO_COMPLETE
+#define CONFIG_CMDLINE_EDITING
+
+#define CONFIG_CMD_FLASH
+#define CONFIG_CMD_SAVEENV
+#define CONFIG_CMD_MEM
+#define CONFIG_CMD_MISC
+#define CONFIG_CMD_TIMER
+
+#endif /* __CONFIG_H */
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